Featureless
Flat, uniform, unbroken, unwrinkled, levelled, flush, (as) flat as a pancake, homaloidal, smooth, featureless, undamaged, level, plane, true, and planar.
Drawn
Tied, all square, on a par, neck and neck, level, even-steven(s), drawn, balanced, on an equal footing, nip and tuck, and level pegging.
Identical
Equal, much the same, like, similar, comparable, corresponding, on a par, evenly matched, the same, identical, alike, to the same degree, commensurate, parallel, on an equal footing, and even-steven(s).
Steady
Uniform, steady, consistent, unvarying, unwavering, unaltering, constant, stable, changeless, unchanging, unfluctuating, and regular.
Stable
Even-tempered, stable, placid, calm, poised, cool, cool-headed, easy, unexcitable, unflustered, unworried, unbothered, laid-back, unfazed, well balanced, equable, serene, composed, tranquil, and collected, relaxed, imperturbable, unruffled, unagitated, untroubled, together, unflappable, and equanimous.